<template>
  <div>
    <!--  面包屑导航-->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>用户管理</el-breadcrumb-item>
      <el-breadcrumb-item>用户列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!--  卡片视图区域-->
    <el-card class="box-card">
      <!-- 卡片头部-->
      <div slot="header"
           class="clearfix">
        <!-- 搜索与添加区域-->
        <el-row :gutter="20">
          <el-col :span="8">
            <el-input placeholder="请输入内容"
                      v-model="queryInfo.query"
                      clearable
                      @clear='getUserList'>
              <el-button slot="append"
                         icon="el-icon-search"
                         @click="getUserList"></el-button>
            </el-input>
          </el-col>
          <el-col :span="5">
            <el-button style="float: left; padding: 12px 16px"
                       type="primary"
                       @click="addDialogVisible = true">添加用户</el-button>
          </el-col>
        </el-row>
      </div>

      <!-- 用户列表区域  stripe: 斑马条纹  border：边框-->
      <el-table :data="userlist"
                border
                stripe>
        <el-table-column type="index"
                         label="#"></el-table-column>
        <el-table-column prop="username"
                         label="姓名"></el-table-column>
        <el-table-column prop="email"
                         label="邮箱"></el-table-column>
        <el-table-column prop="mobile"
                         label="电话"></el-table-column>
        <el-table-column prop="role_name"
                         label="角色"></el-table-column>
        <el-table-column label="状态">
          <!-- slot-scope接受了作用域的数据  -->
          <template slot-scope="scope">
            <el-switch @change="userStateChange(scope.row)"
                       v-model="scope.row.mg_state"></el-switch>
          </template>
        </el-table-column>
        <el-table-column label="操作"
                         width="200px">
          <template slot-scope="scope">
            <!-- circle 圆型按钮-->
            <!-- 修改按钮-->
            <el-button type="primary"
                       icon="el-icon-edit"
                       size="mini"
                       @click="showEditDialog(scope.row.id)"></el-button>
            <!-- 删除按钮-->
            <el-button type="danger"
                       icon="el-icon-delete"
                       size="mini"
                       @click="removeUserById(scope.row.id)"></el-button>
            <!-- :enterable="false"  鼠标不可进入提示-->
            <!-- 分配角色按钮-->
            <el-tooltip effect="dark"
                        content="分配角色"
                        placement="top"
                        :enterable="false">
              <el-button type="warning"
                         icon="el-icon-setting"
                         size="mini"
                         @click="showSetRole(scope.row)"></el-button>
            </el-tooltip>
          </template>
        </el-table-column>
      </el-table>

      <!-- 分页区域
       current-page 当前显示页数
       page-size 当前情况下显示多少条数据
      -->
      <el-pagination @size-change="handleSizeChange"
                     @current-change="handleCurrentChange"
                     :current-page="queryInfo.pagenum"
                     :page-sizes="[3, 5, 8, 10]"
                     :page-size="queryInfo.pagesize"
                     layout="total, sizes, prev, pager, next, jumper"
                     :total="total">
      </el-pagination>
    </el-card>

    <!-- 添加用户dialog对话框 -->
    <!--  :visible.sync 对话框的显示与隐藏 -->
    <el-dialog title="添加用户"
               :visible.sync="addDialogVisible"
               width="50%"
               @close="addDialogClosed">
      <!-- 添加用户对话框的内容主题区域 -->
      <!-- model数据绑定对象
        rules验证规则对象
        ref数据引用对象
        label提示文本
        prop具体校验规则对象(rules中实现)-->
      <el-form label-position='left'
               :rules="addFromRules"
               ref="addUserFormRef"
               label-width="80px"
               :model="addFroms">
        <el-form-item label="用户名"
                      prop="username">
          <el-input v-model="addFroms.username"></el-input>
        </el-form-item>

        <el-form-item label="密码"
                      prop="password">
          <el-input type="password"
                    v-model="addFroms.password"></el-input>
        </el-form-item>

        <el-form-item label="邮箱"
                      prop="email">
          <el-input v-model="addFroms.email"></el-input>
        </el-form-item>

        <el-form-item label="手机"
                      prop="mobile">
          <el-input v-model="addFroms.mobile"></el-input>
        </el-form-item>
      </el-form>

      <!-- 对话框底部区域 -->
      <span slot="footer"
            class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary"
                   @click="addUser">确 定
        </el-button>
      </span>
    </el-dialog>

    <!-- 修改用户的对话框-->
    <el-dialog title="修改用户"
               :visible.sync="editDialogVisible"
               width="50%"
               @close="editUserDialogClosed">
      <el-form ref="editUserFormRef"
               :rules="editUserRules"
               :model="editUserForm"
               label-width="80px">
        <el-form-item label="用户名">
          <el-input v-model="editUserForm.username"
                    disabled></el-input>
        </el-form-item>
        <el-form-item label="邮箱"
                      prop="email">
          <el-input v-model="editUserForm.email"></el-input>
        </el-form-item>
        <el-form-item label="手机"
                      prop="mobile">
          <el-input v-model="editUserForm.mobile"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer"
            class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary"
                   @click="editUserInfo">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 分配角色的对话框-->
    <el-dialog title="分配角色"
               :visible.sync="setRoleDialogVisible"
               width="50%"
               @close="setRoleDialogClosed">
     <div>
     <p> 当前的用户: {{userInfo.username}}  </p>
     <p> 当前的角色: {{userInfo.role_name}} </p>
     <p> 角色的描述: {{this.roleDesc}} </p>
     <p> 分配新角色:
     <!-- selecteddRoleId 选中下拉阿的值
     :label 看到的数据
     :value 真正选中的值-->
     <el-select v-model="selectedRoleId" placeholder="请分配角色" @change="changeSelectVal">
       <el-option
         v-for="item in rolesList"
         :key="item.id"
         :label="item.roleName"
         :value="item.id">
       </el-option>
     </el-select>
     </p>
       </div>
      <span slot="footer" class="dialog-footer">
          <el-button @click="setRoleDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="saveRoleInfo">确 定</el-button>
       </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data () {
    // 自定义邮箱规则
    var checkEmail = (rule, value, callback) => {
      const regEmail = /^\w+@\w+(\.\w+)+$/
      if (regEmail.test(value)) {
        return callback()
      }
      callback(new Error('请输入合法的邮箱'))
    }

    // 自定义手机号规则
    var checkMobile = (rule, value, callback) => {
      const regMobile = /^1[34578]\d{9}$/
      if (regMobile.test(value)) {
        return callback()
      }
      // 返回一个错误提示
      callback(new Error('请输入合法的手机号码'))
    }
    return {
      // 获取用户列表的参数对象
      queryInfo: {
        query: '',
        // 当前页数
        pagenum: 1,
        // 当前每页显示多少条数据
        pagesize: 5
      },
      userlist: [],
      // 总用户数量
      total: 0,
      // 控制新增用户对话框的显示与隐藏
      addDialogVisible: false,
      // 添加用户的表单数据
      addFroms: {
        username: '',
        password: '',
        email: '',
        mobile: ''
      },
      // 验证规则对象
      addFromRules: {
        username: [{
          required: true,
          message: '请输入用户名',
          tigger: 'blur'
        }, {
          min: 3,
          max: 8,
          message: '用户名在3~8个字符之间',
          tigger: 'blur'
        }],
        password: [{
          required: true,
          message: '请输入密码',
          tigger: 'blur'
        }, {
          min: 6,
          max: 12,
          message: '密码在6~12个字符之间',
          tigger: 'blur'
        }],
        email: [{
          required: true,
          message: '请输入邮箱',
          tigger: 'blur'
        }, {
          validator: checkEmail,
          trigger: 'blur'
        }],
        mobile: [{
          required: true,
          message: '请输入邮箱',
          tigger: 'blur'
        }, {
          validator: checkMobile,
          trigger: 'blur'
        }]
      },
      // 修改用户对话框的显示与隐藏
      editDialogVisible: false,
      // 查询用户信息对象
      editUserForm: {},
      // 修改用户规则对象
      editUserRules: {
        email: [{
          required: true,
          message: '请输入用户邮箱',
          trigger: 'blur'
        }, {
          validator: checkEmail,
          trigger: 'blur'
        }],
        mobile: [{
          required: true,
          message: '请输入手机号码',
          trigger: 'blur'
        }, {
          validator: checkMobile,
          trigger: 'blur'
        }]
      },
      // 控制分配角色对话框显示与隐藏
      setRoleDialogVisible: false,
      // 需要被分配角色的用户信息
      userInfo: {},
      // 获取的角色列表数据
      rolesList: [],
      // 下拉选中的角色id值
      selectedRoleId: '',
      // 角色描述
      roleDesc: ''
    }
  },
  created () {
    this.getUserList()
  },
  methods: {
    // async优化异步操作
    async  getUserList () {
      // get 参数用params指定
      // use await can get data object
      const { data: res } = await this.$http.get('users', { params: this.queryInfo })
      if (res.meta.status !== 200) {
        return this.$message.error('获取用户列表失败！')
      }
      this.userlist = res.data.users
      this.total = res.data.total
    },
    // 监听pagesize改变的事件   控制每页数据多少条
    handleSizeChange (newSize) {
      this.queryInfo.pagesize = newSize
      this.getUserList()
    },
    // 页码值发生切换
    handleCurrentChange (newPage) {
      this.queryInfo.pagenum = newPage
      this.getUserList()
    },
    // 监听switch开关状态的改变
    async userStateChange (userinfo) {
      const { data: res } = await this.$http.put(`users/${userinfo.id}/state/${userinfo.mg_state}`)
      if (res.meta.status !== 200) {
        userinfo.mg_state = !userinfo.mg_state
        return this.$message.error('用户状态更新失败!')
      }
      this.$message.success('用户状态更新成功!')
    },
    //  添加用户对话框关闭
    addDialogClosed () {
      // 先监听close事件 在引用ref的resetFields
      this.$refs.addUserFormRef.resetFields()
    },
    // 点击按钮添加新用户
    addUser () {
      // 提交请求前，表单预验证
      this.$refs.addUserFormRef.validate(async valid => {
        if (!valid) {
          return this.$message.error('请根据提示填写')
        }
        // 发起添加用户的网络请求
        const { data: res } = await this.$http.post('users', this.addFroms)
        if (res.meta.status !== 201) {
          this.$message.error('添加用户失败')
        }
        this.$message.success('添加用户成功')
        this.addDialogVisible = false
        // 刷新列表数据
        this.getUserList()
      })
    },
    // 展示编辑用户的对话框
    async showEditDialog (id) {
      const { data: res } = await this.$http.get('users/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('查询用户信息失败')
      }
      this.editUserForm = res.data
      this.editDialogVisible = true
    },
    // id 删除用户
    async removeUserById (id) {
      // messageBox弹框提示
      const confirmResult = await this.$confirm('此操作将永久删除该用户,是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      // 用户确认删除,返回字符串 confirm
      // 用户取消删除,返回字符串 cancel
      if (confirmResult !== 'confirm') {
        return this.$message({
          type: 'info',
          message: '已取消删除'
        })
      }
      const { data: res } = await this.$http.delete('users/' + id)
      if (res.meta.status !== 200) return this.$message.error('删除用户失败')
      this.$message.success('删除用户成功')
      this.getUserList()
    },
    // 展示分配角色的对话框
    async showSetRole (userInfo) {
      this.userInfo = userInfo
      // 显示对话框之前,获取所有角色的列表
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色数据失败')
      }
      this.rolesList = res.data
      // console.log(this.rolesList[3].roleName)
      this.setRoleDialogVisible = true
    },
    // 修改用户框关闭
    editUserDialogClosed () {
      // 重置表格
      this.$refs.editUserFormRef.resetFields()
    },
    // 修改用户信息并提交
    editUserInfo () {
      // 调用refs引用的editUserFormRef方法进行表单预验证
      this.$refs.editUserFormRef.validate(async valid => {
        // 表单预校验失败
        if (!valid) return this.$message.error('请按照提示进行修改')
        // true 发起修改用户信息的数据请求
        const { data: res } = await this.$http.put('users/' + this.editUserForm.id, {
          email: this.editUserForm.email,
          mobile: this.editUserForm.mobile
        })
        if (res.meta.status !== 200) {
          return this.$message.error('修改用户信息失败,请重试')
        }
        // 关闭对话框
        this.editDialogVisible = false
        // 刷新数据列表
        this.getUserList()
        // 提示修改成功
        this.$message.success('更新用户信息成功')
      })
    },
    // 分配新角色
    async saveRoleInfo () {
      // 用户未选择
      if (!this.selectedRoleId) {
        return this.$message.error('请分配新角色')
      }
      // 获取角色列表
      const { data: res } = await this.$http.put(`users/${this.userInfo.id}/role`, { rid: this.selectedRoleId })
      // 状态码不等于200 请求错误
      if (res.meta.status !== 200) {
        return this.$message.error('更新角色失败')
      }
      this.$message.success('更新角色成功')
      // 更新列表
      this.getUserList()
      this.setRoleDialogVisible = false
    },
    // 分配角色对话框关闭
    setRoleDialogClosed () {
      this.selectedRoleId = ''
      this.userInfo = {}
      this.roleDesc = ''
    },
    //  角色下拉框select选中值发生变化时触发
    async changeSelectVal () {
      // 获取查询角色
      const { data: resu } = await this.$http.get(`roles/${this.selectedRoleId}`)
      if (resu.meta.status === 200) {
        this.roleDesc = resu.data.roleDesc
      }
    }
  }
}
</script>

<style lang="scss" scoped></style>
